3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||303.97 g mol−1|
|Appearance||long white needles, colourless crystalline solid|
|Density||5.40 g cm−3|
|Melting point||151.4 °C (304.5 °F; 424.5 K) , 154.4 °C|
|Boiling point||230 °C (446 °F; 503 K)|
|bismuth trichloride, bismuth tribromide, bismuth triiodide, pentamethylbismuth|
|phosphorus pentafluoride, arsenic pentafluoride, antimony pentafluoride|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Bismuth pentafluoride is an inorganic compound with the formula BiF5. It is a white solid that is highly reactive. The compound is of interest to researchers but not of particular value.
BiF5 can be prepared by treating BiF3 with F2 at 500 °C.
Bismuth pentafluoride is the most reactive of the pnictogen pentafluorides and is an extremely strong fluorinating agent. It reacts vigorously with water to form ozone and oxygen difluoride, and with iodine or sulfur at room temperature. BiF5 fluorinates paraffin oil (hydrocarbons) to fluorocarbons above 50 °C and oxidises UF4 to UF6 at 150 °C. At 180 °C, bismuth pentafluoride fluorinates Br2 to BrF3 and Cl2 to ClF.
BiF5 also reacts with alkali metal fluorides, MF, to form hexafluorobismuthates, M[BiF6], containing the hexafluorobismuthate anion, [BiF6]−.